<template>
    <div class="type-nav" @mouseleave='currentIndex=-2'>
        <div class="container" @mouseenter="currentIndex=-1"  @mouseleave="handleHid">
            <h2 class="all" @mouseenter="handleShow">全部商品分类</h2>
            <nav class="nav">
                <a href="###">服装城</a>
                <a href="###">美妆馆</a>
                <a href="###">尚品汇超市</a>
                <a href="###">全球购</a>
                <a href="###">闪购</a>
                <a href="###">团购</a>
                <a href="###">有趣</a>
                <a href="###">秒杀</a>
            </nav>
          <transition name='sort'>
            <div class="sort" v-show='showList' @click='toSearch'>
                <div class="all-sort-list2">
                    <div class="item" v-for='(category1,index) in categoryList' 
                    :key='category1.categoryId'
                    :class='{showcategory:currentIndex===index}'
                    @mouseenter='showFirstCategory(index)'>
                        <h3>
                            <a href="javascript:;" :class="{showCategory:currentIndex===index}"
                            :data-id1='category1.categoryId' :data-name='category1.categoryName'>{{category1.categoryName}}</a>
                        </h3>
                        <div class="item-list clearfix">
                            <div class="subitem">
                                <dl class="fore" v-for='category2 in category1.categoryChild' :key='category2.categoryId'>
                                    <dt >
                                        <a href="javascript:;" :data-id2='category2.categoryId' :data-name='category2.categoryName'>{{category2.categoryName}}</a>
                                    </dt>
                                    <dd>
                                        <em  v-for='category3 in category2.categoryChild' :key='category3.categoryId'>
                                            <a href="javascript:;" :data-id3='category3.categoryId' :data-name='category3.categoryName'>{{category3.categoryName}}</a>
                                        </em>
                                        
                                    </dd>
                                </dl>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
          </transition>
        </div>
    </div>
</template>

<script>
import {mapState} from 'vuex';
import throttle from 'lodash/throttle.js';
    export default {
        name: "typenav",
        data(){
            return{
                currentIndex:-2,
                showList:this.$route.meta.showList,
            }
        },
        computed:{
            ...mapState({
                categoryList:state=>state.home.categoryList
            }),
            ...mapState(['keyword'])
        },
        methods:{
            showFirstCategory:throttle(function(index){
                if(this.currentIndex>-2){
                    this.currentIndex=index
                }
            },80),
            handleShow(){
                if(this.$route.name!=='home'){
                    this.showList=true
                }
            },
            handleHid(){
                 if(this.$route.name!=='home'){
                    this.showList=false
                }
            },
            toSearch(ev){
            //    console.log(ev.target);
                const{id1,id2,id3,name}=ev.target.dataset;
                
                let options={name:'search',query:{},hash:`#${Date.now()}`};
                let params=this.$route.params;
                for(let key in params){
                    if(!params[key]){
                        delete params[key]
                    }
                }
                if(Object.keys(params).length!=0) options.params=params
                id1?options.query.category1Id=id1:''
                id2?options.query.category2Id=id2:''
                id3?options.query.category3Id=id3:''
                name?options.query.categoryName=name:''
                
                if(this.$route.name==='search'){
                    this.handleHid()
                }
                let keyword=this.$route.params.keyword;
                if(keyword&&this.keyword!==keyword){
                    options.params.keyword=this.keyword
                }
                this.$router.push(options)
            }
 
        },
    }
</script>

<style scoped lang="less">
    .type-nav {
        border-bottom: 2px solid #e1251b;

        .container {
            width: 1200px;
            margin: 0 auto;
            display: flex;
            position: relative;

            .all {
                width: 210px;
                height: 45px;
                background-color: #e1251b;
                line-height: 45px;
                text-align: center;
                color: #fff;
                font-size: 14px;
                font-weight: bold;
            }

            .nav {
                a {
                    height: 45px;
                    margin: 0 22px;
                    line-height: 45px;
                    font-size: 16px;
                    color: #333;
                }
            }

            .sort {
                position: absolute;
                left: 0;
                top: 45px;
                width: 210px;
                height: 461px;
                position: absolute;
                background: #fafafa;
                z-index: 999;

                .all-sort-list2 {
                    .item {
                        h3 {
                            line-height: 30px;
                            font-size: 14px;
                            font-weight: 400;
                            overflow: hidden;
                            margin: 0;

                            a {
                                // background: deeppink;
                                padding: 0 20px;
                                display: block !important;
                                color: #333;
                            }
                        }

                        .item-list {
                            display: none;
                            position: absolute;
                            width: 734px;
                            min-height: 460px;
                            background: #f7f7f7;
                            left: 210px;
                            border: 1px solid #ddd;
                            top: 0;
                            z-index: 9999 !important;

                            .subitem {
                                float: left;
                                width: 650px;
                                padding: 0 4px 0 8px;

                                dl {
                                    border-top: 1px solid #eee;
                                    padding: 6px 0;
                                    overflow: hidden;
                                    zoom: 1;

                                    &.fore {
                                        border-top: 0;
                                    }

                                    dt {
                                        float: left;
                                        width: 54px;
                                        line-height: 22px;
                                        text-align: right;
                                        padding: 3px 6px 0 0;
                                        font-weight: 700;
                                    }

                                    dd {
                                        float: left;
                                        width: 415px;
                                        padding: 3px 0 0;
                                        overflow: hidden;

                                        em {
                                            float: left;
                                            height: 14px;
                                            line-height: 14px;
                                            padding: 0 8px;
                                            margin-top: 5px;
                                            border-left: 1px solid #ccc;
                                        }
                                    }
                                }
                            }
                        }

                       &.showcategory{
                           background: pink;
                           .item-list {
                                display: block;
                            }
                       }
                    }
                }
            }
        }
    }
</style>